摘要：本文介绍了采用低共熔溶剂进行苯酐和正丁醇催化合成邻苯二甲酸二丁酯

Abstract: This article introduces the use of deep eutectic solvents to catalyze the synthesis of dibutyl phthalate from phthalic anhydride and n-butanol. The effects of solvent type, solvent amount, catalyst type and alcohol-anhydride ratio on the esterification rate were investigated, and the low eutectic solvent was determined. The optimal conditions for the eutectic solvent-catalyzed esterification reaction: when the molar ratio of choline chloride and propylene glycol is 1:1 and the total mass is 15 grams, use a deep eutectic solvent as the reaction medium and synthesize o-phenylene after DES catalysis. Experimental conditions and results for dibutyl dicarboxylate. After experimental optimization, the optimal conditions are that the reaction temperature is 200°C, the reaction time is 1.5h-1, the amount of catalyst sodium bisulfate is 1.5%, and the alcohol-anhydride ratio is 3:1. At this time, the purity of DBP obtained is 99.85%, and the ester The conversion rate is 98.73%. This method is green and efficient, and the catalyst has been optimized and expanded, and can be used for large-scale production of dibutyl phthalate.

Abstract: This article introduces the catalytic synthesis of dibutyl phthalate from phthalic anhydride and n-butanol using a low eutectic solvent. The effects of solvent type, solvent amount, catalyst type, and alcohol anhydride ratio on the esterification rate were investigated, and the optimal conditions for the low eutectic solvent catalyzed esterification reaction were determined. When the molar ratio of choline chloride to propylene glycol was 1:1 and the total mass was 15 grams, the low eutectic solvent was used as the reaction medium, Experimental conditions and results for the synthesis of dibutyl phthalate catalyzed by DES. After experimental optimization, the optimal conditions were as follows: reaction temperature of 200 ℃, reaction time of 1.5h-1, amount of catalyst sodium bisulfate of 1.5%, alcohol anhydride ratio of 3:1. At this time, DBP purity was 99.85%, and esterification rate was 98.73%. This method has the characteristics of green and efficient, and has optimized and expanded the catalyst, which can be used for large-scale production of dibutyl phthalate.

The synthesis of dibutyl phthalate catalyzed by phthalic anhydride and n-butanol in deep eutectic solvents was introduced. The effects of solvent type, solvent amount, catalyst type and the ratio of alcohol to anhydride on the esterification rate were investigated, and the optimum conditions of deep eutectic solvents catalytic esterification were determined: when the molar ratio of choline chloride to propylene glycol was 1:1 and the total mass was 15g, dibutyl phthalate was synthesized by using deep eutectic solvents as the reaction medium. After experimental optimization, the optimum conditions were as follows: reaction temperature was 200℃, reaction time was 1.5h-1, the amount of sodium bisulfate was 1.5%, and the ratio of alcohol to anhydride was 3: 1. At this time, the purity of DBP was 99.85% and the esterification rate was 98.73%. The method is green and efficient, and the catalyst is optimized and expanded, which can be used to produce dibutyl phthalate on a large scale.